JPS6474844A - Duplication control system - Google Patents

Duplication control system

Info

Publication number
JPS6474844A
JPS6474844A JP23304087A JP23304087A JPS6474844A JP S6474844 A JPS6474844 A JP S6474844A JP 23304087 A JP23304087 A JP 23304087A JP 23304087 A JP23304087 A JP 23304087A JP S6474844 A JPS6474844 A JP S6474844A
Authority
JP
Japan
Prior art keywords
communication
current
spare
inter
switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23304087A
Other languages
Japanese (ja)
Inventor
Yuji Ogasawara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP23304087A priority Critical patent/JPS6474844A/en
Publication of JPS6474844A publication Critical patent/JPS6474844A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To eliminate the change of an access control method by an opposite station, by providing an inter-system communication means which supplies respective second node addresses to a 0th system device and a 1st system device in a duplicated device having a switching function of current in use/spare, and utilizes it. CONSTITUTION:The 0th system device 100 is provided with an interanother device communication node address '02' and an inter-system communication address '20', and the 1st system device 101 is also provided with the '02' and a '21' A system current in use performs communication with another device by a LAN adaptor 110 (or 111) by using the '02'. The communication between the system current in use and a spare system is performed via inter-system communication parts 170 and 171 in respective device by using the node addresses '20' and '21'. The spare system monitors the normality of the system current in use by issuing an instruction to perform monitoring by using the node addresses '20' and '21'. When the spare system recognizes the fault of the system current in use and instructs switching, the system current in use receives it and performs the switching. The spare system is used as the system current in use when no switching response is received, and performs the communication by using the inter-another device communication node addresses '20' and '21'. By constituting a device in such way, it is not required to be conscious of recognizing whether an opponent is the system current in use or the spare system.
JP23304087A 1987-09-17 1987-09-17 Duplication control system Pending JPS6474844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23304087A JPS6474844A (en) 1987-09-17 1987-09-17 Duplication control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23304087A JPS6474844A (en) 1987-09-17 1987-09-17 Duplication control system

Publications (1)

Publication Number Publication Date
JPS6474844A true JPS6474844A (en) 1989-03-20

Family

ID=16948857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23304087A Pending JPS6474844A (en) 1987-09-17 1987-09-17 Duplication control system

Country Status (1)

Country Link
JP (1) JPS6474844A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343935A (en) * 1990-09-14 1994-09-06 Kabushiki Kaisha Toshiba Multiple type air conditioning apparatus
JPH06343074A (en) * 1992-12-11 1994-12-13 Nec Corp Anti-fault system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343935A (en) * 1990-09-14 1994-09-06 Kabushiki Kaisha Toshiba Multiple type air conditioning apparatus
JPH06343074A (en) * 1992-12-11 1994-12-13 Nec Corp Anti-fault system

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